I like the ability to use the Arrivals lounge @ NRT and NH lounges on arrival as opposed to being EB Gold, which would only allow their use on departure.

As a Diamond on NH, you'll have at least 40 upgrade points which can come in handy, as a Platinum you'll have between 20 and 40, in addition to getting upgraded to PY instead of Y on eligible routes.

Although I've only seen an op-up once, if you have NH status, you're much more likely going to get that op-up as opposed to being EB gold.

NH Suite lounge/check in is only for F and Diamond.